Reposted by Courtney S.
Walls of the Norman castle of Roebuck, long thought demolished, survive beneath plaster in a Dublin university building. Its oldest sections date to the early 13th century, and its medieval courtyard remains in use.
phys.org
'Lost' medieval castle found hiding inside university building in Dublin
One of Dublin's "lost" medieval castles has been found hiding in plain sight inside University College Dublin's Roebuck Castle.
